The Raise the Wage Act would bring the federal minimum wage up gradually from $7.25 to $15 by 2025. After that year, the rate will be indexed to the median hourly wage of all workers.

House Democrats started the process
of passing a bill in March, but struggled to get support from more moderate members. In recent weeks, party leaders made some key concessions to get enough lawmakers on board. They increased the phase-in time from five to six years, and added a requirement for the government to study the economic impact of the bill after it's in effect, giving Congress the ability to make adjustments in the future.

When fast food workers began widely protesting in 2012 for higher pay, a $15 minimum wage appeared overly ambitious. But since then, some cities and states have raised their local minimum wages to $15 an hour on their own -- including Seattle
, San Francisco, New York City and then all of California and New York State. Companies like McDonald's and Walmart stopped lobbying against
raising the federal minimum wage, and Amazon adopted a $15 minimum last year.

About 1.7 million people, or about 2.1% of all hourly paid workers, earned at or below the federal minimum wage last year, according to the Bureau of Labor Statistics.

Republicans have by a wide majority not voiced support for the bill, concerned that raising the wage to $15 would result in too many jobs lost
. White House economic adviser Larry Kudlow
said in November he doesn't think minimum wages are a good idea at all, raising doubts that President Donald Trump would sign it.

A Congressional Budget Office study
published last week projected that the legislation would raise the wages of 27 million people and lead to 1.3 million fewer jobs, or 0.8% of total employment.

The US Chamber of Commerce has said it's willing to meet in the middle on some higher minimum wage, but that $15 is out of the question.